Question

Kevin plans to put concrete on a rectangular portion of his driveway. The portion is 10 feet long and 3 inches high. The price of concrete is $98 per cubic yard. The total cost of the concrete Kevin needs is $72.59. Which of the following is closest to the width of the portion of the driveway on which Kevin plans to put concrete?

[1 foot = 12 inches; 1 yard = 3 feet]

3 feet
6 feet
8 feet
10 feet

Answer 1

@mathstudent55

Answer 2

I Pick A

Answer 3

@peachpi

Answer 4

@paki

Answer 5

I'm not getting that. What did you do?

Answer 6

Idk I Trying to understand i dont need an answer i just need understanding

Answer 7

ok well to start with, all your numbers are in different units, so you need to convert everything to the same unit. Since all the answers are in feet, convert cubic yards to cubic feet and inches to feet. Using the conversion factors in the problem.

How many feet are 3 inches?

Answer 8

1 yard

Answer 9

0.25 sorry

Answer 10

right, so the depth is 0.25 ft. Now convert the $/cubic yards to $/cubic ft.

1 yard = 3 ft, so for volume
(1 yd)³ = (3 ft)³, meaning 1 yd³ = 27 ft³

So instead of $98/yd³ the price is $98/27 ft³

Answer 11

and you divide that right?

Answer 12

total price = unit price * volume

\[$72.59 = \frac{$98}{27 ft³}(10 ft)(0.25 ft)*w\]
solve for w